int main(int argc, char *argv[])
{
struct udev *udev;
struct udev_event *event = NULL;
struct udev_device *dev = NULL;
struct udev_rules *rules = NULL;
char syspath[UTIL_PATH_SIZE];
const char *devpath;
const char *action;
sigset_t mask, sigmask_orig;
int err = -EINVAL;
udev = udev_new();
if (udev == NULL)
exit(1);
info(udev, "version %s\n", VERSION);
udev_selinux_init(udev);
sigprocmask(SIG_SETMASK, NULL, &sigmask_orig);
action = argv[1];
if (action == NULL) {
err(udev, "action missing\n");
goto out;
}
devpath = argv[2];
if (devpath == NULL) {
err(udev, "devpath missing\n");
goto out;
}
rules = udev_rules_new(udev, 1);
util_strscpyl(syspath, sizeof(syspath), udev_get_sys_path(udev), devpath, NULL);
dev = udev_device_new_from_syspath(udev, syspath);
if (dev == NULL) {
info(udev, "unknown device '%s'\n", devpath);
goto out;
}
udev_device_set_action(dev, action);
event = udev_event_new(dev);
sigfillset(&mask);
sigprocmask(SIG_SETMASK, &mask, &sigmask_orig);
event->fd_signal = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC);
if (event->fd_signal < 0) {
fprintf(stderr, "error creating signalfd\n");
goto out;
}
/* do what devtmpfs usually provides us */
if (udev_device_get_devnode(dev) != NULL) {
mode_t mode;
if (strcmp(udev_device_get_subsystem(dev), "block") == 0)
mode |= S_IFBLK;
else
mode |= S_IFCHR;
if (strcmp(action, "remove") != 0) {
util_create_path(udev, udev_device_get_devnode(dev));
mknod(udev_device_get_devnode(dev), mode, udev_device_get_devnum(dev));
} else {
unlink(udev_device_get_devnode(dev));
util_delete_path(udev, udev_device_get_devnode(dev));
}
}
err = udev_event_execute_rules(event, rules, &sigmask_orig);
if (err == 0)
udev_event_execute_run(event, NULL);
out:
if (event != NULL && event->fd_signal >= 0)
close(event->fd_signal);
udev_event_unref(event);
udev_device_unref(dev);
udev_rules_unref(rules);
udev_selinux_exit(udev);
udev_unref(udev);
if (err != 0)
return 1;
return 0;
}
int main(int argc, char *argv[])
{
struct udev *udev;
struct udev_event *event;
struct udev_device *dev;
struct udev_rules *rules;
char syspath[UTIL_PATH_SIZE];
const char *devpath;
const char *action;
const char *subsystem;
struct sigaction act;
int err = -EINVAL;
udev = udev_new();
if (udev == NULL)
exit(1);
info(udev, "version %s\n", VERSION);
udev_selinux_init(udev);
/* set signal handlers */
memset(&act, 0x00, sizeof(act));
act.sa_handler = (void (*)(int)) sig_handler;
sigemptyset (&act.sa_mask);
act.sa_flags = 0;
sigaction(SIGALRM, &act, NULL);
sigaction(SIGINT, &act, NULL);
sigaction(SIGTERM, &act, NULL);
/* trigger timeout to prevent hanging processes */
alarm(UDEV_EVENT_TIMEOUT);
action = getenv("ACTION");
devpath = getenv("DEVPATH");
subsystem = getenv("SUBSYSTEM");
if (action == NULL || subsystem == NULL || devpath == NULL) {
err(udev, "action, subsystem or devpath missing\n");
goto exit;
}
rules = udev_rules_new(udev, 1);
util_strlcpy(syspath, udev_get_sys_path(udev), sizeof(syspath));
util_strlcat(syspath, devpath, sizeof(syspath));
dev = udev_device_new_from_syspath(udev, syspath);
if (dev == NULL) {
info(udev, "unknown device '%s'\n", devpath);
goto fail;
}
/* skip reading of db, but read kernel parameters */
udev_device_set_info_loaded(dev);
udev_device_read_uevent_file(dev);
udev_device_set_action(dev, action);
event = udev_event_new(dev);
err = udev_event_execute_rules(event, rules);
/* rules may change/disable the timeout */
if (udev_device_get_event_timeout(dev) >= 0)
alarm(udev_device_get_event_timeout(dev));
if (err == 0 && !event->ignore_device && udev_get_run(udev))
udev_event_execute_run(event);
udev_event_unref(event);
udev_device_unref(dev);
fail:
udev_rules_unref(rules);
exit:
udev_selinux_exit(udev);
udev_unref(udev);
if (err != 0)
return 1;
return 0;
}
